data protection single server edition error 2 data ended

Hi, I have a 2008 R2 Foundation, and when i try to start backup it ends immediately with error code 2 data ended. Is it true that it is unsupported by this operating system (i read this into hp forums) or there are other problems? The backup unit is a hp dat 72 usb and the version of the software is 4.0 sp1.
thanks for support!